Small refactor before we add onboarding cards (#2541)

* For #2390 - Cleans up the toAdapterList method before we add onboarding

* For #2514 - Hide tabs menu when no tabs are open

app/src/main/java/org/mozilla/fenix/home/sessioncontrol/SessionControlAdapter.kt

@@ -22,7 +22,7 @@ import org.mozilla.fenix.home.sessioncontrol.viewholders.TabInCollectionViewHold
 import java.lang.IllegalStateException
 
 sealed class AdapterItem {
-    object TabHeader : AdapterItem()
+    data class TabHeader(val isPrivate: Boolean, val hasTabs: Boolean) : AdapterItem()
     object NoTabMessage : AdapterItem()
     data class TabItem(val tab: Tab) : AdapterItem()
     object PrivateBrowsingDescription : AdapterItem()
@@ -35,7 +35,7 @@ sealed class AdapterItem {
 
     val viewType: Int
         get() = when (this) {
-            TabHeader -> TabHeaderViewHolder.LAYOUT_ID
+            is TabHeader -> TabHeaderViewHolder.LAYOUT_ID
             NoTabMessage -> NoTabMessageViewHolder.LAYOUT_ID
             is TabItem -> TabViewHolder.LAYOUT_ID
             SaveTabGroup -> SaveTabGroupViewHolder.LAYOUT_ID
@@ -52,7 +52,7 @@ class SessionControlAdapter(
     private val actionEmitter: Observer<SessionControlAction>
 ) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
 
-    var items: List<AdapterItem> = listOf()
+    private var items: List<AdapterItem> = listOf()
     private lateinit var job: Job
 
     fun reloadData(items: List<AdapterItem>) {
@@ -69,15 +69,10 @@ class SessionControlAdapter(
             NoTabMessageViewHolder.LAYOUT_ID -> NoTabMessageViewHolder(view)
             TabViewHolder.LAYOUT_ID -> TabViewHolder(view, actionEmitter, job)
             SaveTabGroupViewHolder.LAYOUT_ID -> SaveTabGroupViewHolder(view, actionEmitter)
-            PrivateBrowsingDescriptionViewHolder.LAYOUT_ID -> PrivateBrowsingDescriptionViewHolder(
-                view,
-                actionEmitter
-            )
+            PrivateBrowsingDescriptionViewHolder.LAYOUT_ID -> PrivateBrowsingDescriptionViewHolder(view, actionEmitter)
             DeleteTabsViewHolder.LAYOUT_ID -> DeleteTabsViewHolder(view, actionEmitter)
             CollectionHeaderViewHolder.LAYOUT_ID -> CollectionHeaderViewHolder(view)
-            NoCollectionMessageViewHolder.LAYOUT_ID -> NoCollectionMessageViewHolder(
-                view
-            )
+            NoCollectionMessageViewHolder.LAYOUT_ID -> NoCollectionMessageViewHolder(view)
             CollectionViewHolder.LAYOUT_ID -> CollectionViewHolder(view, actionEmitter, job)
             TabInCollectionViewHolder.LAYOUT_ID -> TabInCollectionViewHolder(view, actionEmitter, job)
             else -> throw IllegalStateException()
@@ -100,6 +95,10 @@ class SessionControlAdapter(
 
     override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
         when (holder) {
+            is TabHeaderViewHolder -> {
+                val tabHeader = items[position] as AdapterItem.TabHeader
+                holder.bind(tabHeader.isPrivate, tabHeader.hasTabs)
+            }
             is TabViewHolder -> holder.bindSession(
                 (items[position] as AdapterItem.TabItem).tab
             )
@@ -107,7 +106,7 @@ class SessionControlAdapter(
                 (items[position] as AdapterItem.CollectionItem).collection
             )
             is TabInCollectionViewHolder -> {
-                val item = (items[position] as AdapterItem.TabInCollectionItem)
+                val item = items[position] as AdapterItem.TabInCollectionItem
                 holder.bindSession(item.collection, item.tab, item.isLastTab)
             }
         }

app/src/main/java/org/mozilla/fenix/home/sessioncontrol/SessionControlComponent.kt

@@ -58,9 +58,16 @@ data class TabCollection(
     var expanded: Boolean = false
 ) : Parcelable
 
+sealed class FirefoxAcocuntsState {
+    object SignedOut : FirefoxAcocuntsState()
+    data class AutoSignedIn(val email: String) : FirefoxAcocuntsState()
+    data class SignedIn(val email: String) : FirefoxAcocuntsState()
+}
+
 sealed class Mode {
     object Normal : Mode()
     object Private : Mode()
+    data class Onboarding(val firefoxAccountsState: FirefoxAcocuntsState) : Mode()
 }
 
 data class SessionControlState(
@@ -110,12 +117,9 @@ sealed class SessionControlChange : Change {
     data class CollectionsChange(val collections: List<TabCollection>) : SessionControlChange()
 }
 
-class SessionControlViewModel(initialState: SessionControlState) :
-    UIComponentViewModelBase<SessionControlState, SessionControlChange>(
-        initialState,
-        reducer
-    ) {
-
+class SessionControlViewModel(
+    initialState: SessionControlState
+) : UIComponentViewModelBase<SessionControlState, SessionControlChange>(initialState, reducer) {
     companion object {
         val reducer: (SessionControlState, SessionControlChange) -> SessionControlState = { state, change ->
             when (change) {

app/src/main/java/org/mozilla/fenix/home/sessioncontrol/SessionControlUIView.kt

@@ -16,60 +16,60 @@ import org.mozilla.fenix.mvi.UIView
 import androidx.recyclerview.widget.ItemTouchHelper
 import org.mozilla.fenix.BuildConfig
 
-// Convert HomeState into a data structure HomeAdapter understands
-@SuppressWarnings("ComplexMethod", "NestedBlockDepth")
-private fun SessionControlState.toAdapterList(): List<AdapterItem> {
+private fun normalModeAdapterItems(tabs: List<Tab>, collections: List<TabCollection>): List<AdapterItem> {
     val items = mutableListOf<AdapterItem>()
-    items.add(AdapterItem.TabHeader)
+    items.add(AdapterItem.TabHeader(false, tabs.isNotEmpty()))
 
-    // Populate tabs
     if (tabs.isNotEmpty()) {
-        tabs.reversed().map(AdapterItem::TabItem).forEach { items.add(it) }
-        if (mode == Mode.Private) {
-            items.add(AdapterItem.DeleteTabs)
-        } else if (BuildConfig.COLLECTIONS_ENABLED) {
+        items.addAll(tabs.reversed().map(AdapterItem::TabItem))
+        if (BuildConfig.COLLECTIONS_ENABLED) {
             items.add(AdapterItem.SaveTabGroup)
         }
     } else {
-        val item = if (mode == Mode.Private) AdapterItem.PrivateBrowsingDescription
-                    else AdapterItem.NoTabMessage
-
-        items.add(item)
+        items.add(AdapterItem.NoTabMessage)
     }
 
-    // Populate collections
-    if (mode == Mode.Normal) {
-        items.add(AdapterItem.CollectionHeader)
-        if (collections.isNotEmpty()) {
+    items.add(AdapterItem.CollectionHeader)
+    if (collections.isNotEmpty()) {
 
-            // If the collection is expanded, we want to add all of its tabs beneath it in the adapter
-            collections.reversed().map(AdapterItem::CollectionItem).forEach {
-                if (it.collection.expanded) {
-                    items.add(it)
-                    addCollectionTabItems(it.collection, it.collection.tabs, items)
-                } else {
-                    items.add(it)
-                }
+        // If the collection is expanded, we want to add all of its tabs beneath it in the adapter
+        collections.reversed().map(AdapterItem::CollectionItem).forEach {
+            items.add(it)
+            if (it.collection.expanded) {
+                items.addAll(collectionTabItems(it.collection))
             }
-        } else {
-            items.add(AdapterItem.NoCollectionMessage)
         }
+    } else {
+        items.add(AdapterItem.NoCollectionMessage)
     }
 
     return items
 }
 
-private fun addCollectionTabItems(
-    collection: TabCollection,
-    tabs: MutableList<Tab>,
-    itemList: MutableList<AdapterItem>
-) {
-    for (tabIndex in 0 until tabs.size) {
-        itemList.add(AdapterItem.TabInCollectionItem
-            (collection, collection.tabs[tabIndex], tabIndex == collection.tabs.size - 1))
+private fun privateModeAdapterItems(tabs: List<Tab>): List<AdapterItem> {
+    val items = mutableListOf<AdapterItem>()
+    items.add(AdapterItem.TabHeader(true, tabs.isNotEmpty()))
+
+    if (tabs.isNotEmpty()) {
+        items.addAll(tabs.reversed().map(AdapterItem::TabItem))
+        items.add(AdapterItem.DeleteTabs)
+    } else {
+        items.add(AdapterItem.PrivateBrowsingDescription)
     }
+
+    return items
 }
 
+private fun SessionControlState.toAdapterList(): List<AdapterItem> = when (mode) {
+    is Mode.Normal -> normalModeAdapterItems(tabs, collections)
+    is Mode.Private -> privateModeAdapterItems(tabs)
+    is Mode.Onboarding -> listOf()
+}
+
+private fun collectionTabItems(collection: TabCollection) = collection.tabs.mapIndexed { index, tab ->
+        AdapterItem.TabInCollectionItem(collection, tab, index == collection.tabs.lastIndex)
+    }
+
 class SessionControlUIView(
     container: ViewGroup,
     actionEmitter: Observer<SessionControlAction>,

app/src/main/java/org/mozilla/fenix/home/sessioncontrol/viewholders/TabHeaderViewHolder.kt

@@ -19,14 +19,14 @@ import org.mozilla.fenix.home.sessioncontrol.TabAction
 import org.mozilla.fenix.home.sessioncontrol.onNext
 
 class TabHeaderViewHolder(
-    view: View,
+    private val view: View,
     private val actionEmitter: Observer<SessionControlAction>
 ) : RecyclerView.ViewHolder(view) {
     private var isPrivate = false
     private var tabsMenu: TabHeaderMenu
 
     init {
-        tabsMenu = TabHeaderMenu(view.context) {
+        tabsMenu = TabHeaderMenu(view.context, isPrivate) {
             when (it) {
                 is TabHeaderMenu.Item.Share -> actionEmitter.onNext(TabAction.ShareTabs)
                 is TabHeaderMenu.Item.CloseAll -> actionEmitter.onNext(TabAction.CloseAll(isPrivate))
@@ -37,11 +37,8 @@ class TabHeaderViewHolder(
                 )
             }
         }
-        view.apply {
-            val headerTextResourceId =
-                if (isPrivate) R.string.tabs_header_private_title else R.string.tab_header_label
-            header_text.text = context.getString(headerTextResourceId)
 
+        view.apply {
             add_tab_button.run {
                 setOnClickListener {
                     actionEmitter.onNext(TabAction.Add)
@@ -58,8 +55,19 @@ class TabHeaderViewHolder(
         }
     }
 
+    fun bind(isPrivate: Boolean, hasTabs: Boolean) {
+        this.isPrivate = isPrivate
+        tabsMenu.isPrivate = isPrivate
+
+        val headerTextResourceId =
+            if (isPrivate) R.string.tabs_header_private_title else R.string.tab_header_label
+        view.header_text.text = view.context.getString(headerTextResourceId)
+        view.tabs_overflow_button.visibility = if (hasTabs) View.VISIBLE else View.GONE
+    }
+
     class TabHeaderMenu(
         private val context: Context,
+        var isPrivate: Boolean,
         private val onItemTapped: (Item) -> Unit = {}
     ) {
         sealed class Item {
@@ -81,20 +89,13 @@ class TabHeaderViewHolder(
                     context.getString(R.string.tabs_menu_share_tabs)
                 ) {
                     onItemTapped.invoke(Item.Share)
-                }
-            ).let {
-                val list = it.toMutableList()
-                if (BuildConfig.COLLECTIONS_ENABLED) {
-                    list.add(
-                        SimpleBrowserMenuItem(
-                            context.getString(R.string.tabs_menu_save_to_collection)
-                        ) {
-                            onItemTapped.invoke(Item.SaveToCollection)
-                        }
-                    )
-                }
-                list
-            }
+                },
+                SimpleBrowserMenuItem(
+                    context.getString(R.string.tabs_menu_save_to_collection)
+                ) {
+                    onItemTapped.invoke(Item.SaveToCollection)
+                }.apply { visible = { !isPrivate && BuildConfig.COLLECTIONS_ENABLED } }
+            )
         }
     }
 

app/src/main/java/org/mozilla/fenix/home/sessioncontrol/viewholders/TabInCollectionViewHolder.kt

@@ -47,7 +47,6 @@ class TabInCollectionViewHolder(
     var isLastTab = false
 
     init {
-
         collection_tab_icon.clipToOutline = true
         collection_tab_icon.outlineProvider = object : ViewOutlineProvider() {
             override fun getOutline(view: View?, outline: Outline?) {

app/src/main/res/layout/tab_header.xml

@@ -21,27 +21,30 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
-    <ImageButton
-        android:id="@+id/add_tab_button"
-        android:layout_width="20dp"
-        android:layout_height="20dp"
-        android:layout_marginEnd="30dp"
-        android:background="?android:attr/selectableItemBackgroundBorderless"
-        android:contentDescription="@string/add_tab"
-        android:src="@drawable/ic_new"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toStartOf="@id/tabs_overflow_button"
-        app:layout_constraintTop_toTopOf="parent" />
-
-    <ImageButton
-        android:id="@+id/tabs_overflow_button"
-        android:layout_width="24dp"
-        android:layout_height="24dp"
+    <LinearLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
         android:layout_marginEnd="4.5dp"
-        android:background="?android:attr/selectableItemBackgroundBorderless"
-        android:contentDescription="@string/open_tabs_menu"
-        android:src="@drawable/ic_menu"
         app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintEnd_toEndOf="parent">
+        <ImageButton
+            android:id="@+id/add_tab_button"
+            android:layout_width="24dp"
+            android:layout_height="24dp"
+            android:layout_marginEnd="8dp"
+            android:background="?android:attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/add_tab"
+            android:src="@drawable/ic_new"/>
+
+        <ImageButton
+            android:id="@+id/tabs_overflow_button"
+            android:layout_width="24dp"
+            android:layout_height="24dp"
+            android:layout_marginStart="8dp"
+            android:background="?android:attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/open_tabs_menu"
+            android:src="@drawable/ic_menu" />
+    </LinearLayout>
 </androidx.constraintlayout.widget.ConstraintLayout>